Recycling 101: The Ultimate Guide to the Waste Hierarchy

What It Is and How to Use It

Throughout our Recycling 101 series, we’ve delved into what and how to recycle. While recycling is one aspect of waste management and living a more sustainable life, it’s not the only – or the most important – part.

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In fact, as we’ve discussed in this series before, recycling has a lot of issues. From contamination to lack of consumer understanding, recycling rates globally sit at around 9% – a far cry from ideal.

That’s where the waste hierarchy comes into play. This framework breaks down the best ways to go about waste management to get to a more sustainable economy and zero waste future. And, as you’ll note, recycling is far from the top.

What is the Waste Hierarchy?

The waste hierarchy is a strategic framework of waste management principles. Designed as a pyramid, the waste hierarchy lays out the best ways (at the top) and the worst ways (at the bottom) to reduce and eliminate waste. It’s a helpful guide to follow if you’re working toward zero waste.

There are many different variations of the waste hierarchy, with more or less tiers, but they all generally break down the same things. Some are more designed as an easy resource for individuals, while others are more complex and geared towards waste management professionals.

While not a perfect system, the waste hierarchy is designed to help people focus on and implement changes at the top that have a larger impact on waste reduction.

Generally though, they look something like this:

Refuse + Reduce

The first tier on the waste hierarchy is refuse + reduce. This should always be the more preferential way to eliminate waste wherever possible. It may mean rethinking the way we use products, designing more efficient systems, and considering what we truly need and is beneficial to us.

Refusing means stopping waste at its source by declining products that are harmful to the planet or aren’t necessary. Reducing means cutting back on products that can’t fully be eliminated but can be mitigated in some ways.

Practical tips:

• Invest in reusable cups and bottles to reduce single use plastic and takeaway coffee cups
• Use bags you already have and refuse bags at the grocery store
• Plan out meals and grocery shopping, so you never over buy food, reducing food waste on an individual level
• Switch to more sustainable materials like glass and paper over plastic – this helps you reduce materials that cannot be recycled or reused (more on this below)

Reuse

Avoiding products and packaging altogether is not always possible. Accepting this, reusing products is always the next best thing. Reuse is a big category of actions that may include repairing or maintaining products to the best of your ability and buying used over new.

Both on an individual basis and within our companies and communities, we should strive to reuse as much as possible. Doing so promotes a circular economy and helps keep things out of landfills, while also ensuring that we don’t produce more than needed.

Practical tips:

• Reuse glass jars as food storage
• Repair electronics instead of replacing them
• If you’re moving, ask local stores for cardboard boxes for reuse
• Buy used goods and clothing, instead of new

Repurpose

The next tier on the waste hierarchy is repurpose. When something can no longer be reused for its original purpose, trying to find a new way to use it – or parts of it – for another function, is the next best thing. It still prevents it from going to landfill and can often be just as useful in another function.

Repurposing is sometimes used interchangeably with upcycling, but they are slightly different. Upcycling is giving a product a face lift and using it in a similar way to the original product – like painting furniture. It’s still a great way to give new life to old products, but it’s not the same as repurposing. Repurposing is changing the purpose of a product completely to be used in a different way.

Practical tips:

• Use old t-shirts as dusting rags
• Repurpose wooden furniture into shelves or different products
• Make a dog or cat bed out of old towels
• Use paper towel and toilet paper rolls at arts and crafts supplies

Recycle

Recycling, which includes composting food scraps, is often seen as an easy environmentally friendly thing to do. While we advocate for recycling and improving our recycling systems and material choices, it’s not the best, most sustainable way to reduce waste. In fact, it’s only one tier above dispose.

That’s because recycling involves breaking down a material and recreating it into something new. This can include melting down plastic, glass, or metal and reforming them into new products. It’s a very energy intensive process that takes a lot of work to do, though it’s still less energy intensive than producing virgin materials. Plus, while glass and metal are infinitely recyclable, plastic and paper are not and often require virgin materials to fully recreate.

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This tier may also include downcycling, which is a different type of recycling. In this process, products are broken down and turned into a product of lesser quality or turned into something that cannot be recycled again. Nylon fabrics made from recycled bottles are an example of this.

Practical tips:

• Check what your council or waste provider accepts to reduce contamination
• Look for products made with recycled materials over virgin materials
• Start composting at home or in the workplace

Dispose

The lowest tier of the hierarchy, and the one that should be avoided as much as possible, is disposal. When all other alternatives have failed, disposing of something is the only option left. That’s because disposing of products either means throwing them in a landfill, having them incinerated, or otherwise dumping them in the natural environment in some way.

This can have a lot of negative effects on the environment from heightened emissions to destruction of habitats. If you’re working toward a zero waste goal, keeping disposal at below 10% is generally a good first goal. It may be impossible to completely avoid, but limiting the amount of waste we send to landfills and incinerators is the best and most sustainable option.

Types of Disposals: Continuous Feed vs. Batch Feed Garbage Disposals

Garbage disposals come in two feed types: batch feed and continuous feed.

Batch feed disposals can only be turned on by putting a special magnetic stopper in place. These models prevent objects from accidentally falling into the disposal when in use. With this type of model, you can insert food waste in batches and run it all at one time. A batch feed garbage disposal is likely the best disposal choice for locations where adding an electrical switch isn't viable.

Continuous feed disposals operate as long as the power is switched on, so you can clean up as you go. Continuous feed garbage disposals typically involve a wall switch, sink-top switch activator or power outlet below the countertop. This variety is the ideal choice for most households and is the most commonly installed type of disposal.

Tip

Most sinks are compatible with a garbage disposal. If you’re adding a new disposal as part of a complete kitchen sink replacement, check the manufacturer’s specifications before purchasing. Some bar sinks have drains that are too small and may not be compatible.

What Horsepower Garbage Disposal Do I Need?

Garbage disposal motors come in varying horsepower (HP) ratings, anywhere from 1/3 HP to 1 HP or even higher. Horsepower determines how much a disposal can grind. If you plan to use your disposal often or have a large household, opt for a model with more power. Below is a breakdown of common HP ratings and their capabilities.

• 1/3 HP: Best for use in small households of up to two people. Recommended for light-duty jobs only.
• 1/2 HP: Ideal for light- to regular-duty jobs in households of two to four people.
  
• 5/8 – 3/4 HP: Best for medium-duty jobs in households of three to five people.
  
• 1 – 1-1/4 HP: Ideal for larger households of four or more people. Can handle heavy-duty jobs.

Refer to the chart above for grinding guidance, including the types of foods and scraps certain HP ratings can handle.

Tip

Garbage disposals with more horsepower often operate more quietly and are less likely to jam than standard or basic disposers with lower horsepower.

Garbage Disposal Features and Accessories to Consider

• Sink-Top Switches: Sold separately, this alternative to a wall switch operates using air pressure and can be installed with a continuous-feed garbage disposal. An ideal switch solution for kitchen islands, it prevents you from having to hardwire to a wall switch.
• Power Cord: Power cords are included with your machine or sold separately. You’ll need a cord if plugging your disposal into an outlet when installing. If you plan to hardwire your disposal and the model you’re considering has an attached power cord, read the product instructions for guidance.
• Auto-Reverse: Some disposals include an auto-reverse feature that automatically spins the grind table in the opposite direction to help loosen and process lodged food, preventing jams.
• Stainless Steel Grind Chamber and Components: Disposals with grind chambers and components made of stainless steel often last longer.
• Quick-Mount Feature: This mounting design allows for easier installation as the mount implements a turn-and-lock system to secure the disposer to the sink.
• Baffle: This rubber guard is installed at the sink opening and keeps food and water from splashing out of the grind chamber.
• Multiple Grind Stages: Basic models include only one grind stage, while other versions have as many as three separate stages to completely pulverize food so it washes down the drain easily.
• Quiet Models: Some disposals incorporate design elements, such as insulation around the disposer, sound baffles at the sink opening and flexible mounting connections, to reduce excess vibration and noise.

Are Garbage Disposals Safe for Septic Systems?

There are disposals specifically designed for homes with a septic tank. During use, these models spray an enzyme to help further break down food waste as it enters your septic system.

Is a Garbage Disposal Right for My Kitchen?

• Check local codes to determine if disposals are allowed in your area.
• Make sure your plumbing is in good working order before purchasing a disposal. If your pipes are prone to clogs, address the cause of the problem during or before installation.

Garbage Disposal Use and Maintenance

• Run cold water down the disposal while it's operating.
• Run the disposal often, and run water after use for a few seconds to rinse internal components. Acid from dried food particles and detergents can corrode the grinding mechanism of your disposal.
• Never pour grease or fat into your disposal.
• Cleanse and rid your disposal of odors that come from stuck-on foods by using your disposal regularly, grinding ice or citrus peels, or use a commercial disposal cleaner. Check the manufacturer’s recommendations to determine which types of cleaning products are safe to use with your disposal.

See How to Install a Garbage Disposal for more helpful tips.

Tip

Garbage disposals vary by model. Consult the manufacturer’s instructions and warranty for information on installation, usage and safety.

How to Install a Garbage Disposal

Garbage Disposal Installation

Kitchen Installation Services

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